Blender Help. Need YOUR help badly

Ok, I have the latest Mac version of blender. All the tutorials show it in Windows format. Can someone tell me or show me how to make a firetruck or at least a simple vehicle so i can get started? I'm making a emergency game where you race to the emergency. I'm only doing this becuase it's simple. I'm going to start small so I can get a hang of this career and work my way up. Anways, I need vehicles for that game so that is why I am asking. So can someone plz show me how to make a truck?